Asked by a Dallas Morning News reporter if he feels the Cowboys are covering up details of the incident, Evans replied: "You're a very perceptive young man."

The Cowboys have been staunchly mum about the incident, which occurred Wednesday evening in a room at the players' on-campus dormitory. Coach Chan Gailey has said only that McIver's injury was the result of "horseplay."

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The wound, a deep cut to McIver's neck near his carotid artery, was so severe that the fifth-year veteran missed last week's exhibition game against the Seattle Seahawks and he isn't scheduled to return to practice until later this week.

McIver, a free-agent who signed a five-year, $9.5 million contract in March, has not been available to reporters since the incident. His agent also is not taking calls.

Evans said he wants to talk with McIver when he returns. In the meantime, the investigation has been stymied by the player's absence and the lack of a complaint.

"You have to have a complaint to move forward," Evans said. "We're here if the person wants to file one. We don't solicit complaints."

Gailey refused to talk about the incident again Monday. Cowboys owner Jerry Jones twice declined comment when asked about his cooperation with campus police.